Relation Between the Anghe of Shotput and the Maximum Projetile Range     

DAI Li qin 《保鲜与加工》2002,(4):122-125

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New Method of Founding Profile Equations and Pressure Angle Formula to the Cylindrical Cam Mechanism with Slide Roller-Follower     

NIU Zhi hong  HE Yu lin 《保鲜与加工》2002,(6):23-26

According to existent problems on design and application of the cylindrical cam mechanism with the slide roller-follower, the one correct concept about profile design and pressure angle is presented. Based on this concept, the theoretical profile,practical profile,meshing surface equations and pressure angle formula of the cam mechanism are built up by using opp.rotation analysis and offset surface principle. This method is very simple and clear, and avoids the abstract analysing process in meshing principle. The mathematic models built by this paper can be used to design,manufacture and check this type of cam mechanism correctly, and also create conditions to make deeply meshing property analysis of this mechanism.  相似文献   

THE DISCUSSION ON ELEVATED WATER TANK DESIGNOF MULTIFLOOR COMMRCIAL RESIDENTIAL BUILDING     

Wang Pu 《保鲜与加工》1995,(3):57-64

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Review on Synthesis Refrectory Nanoparticles     

HUANG Xin  LIU Qing-cai  SUN Ya-li  LUO Jun 《保鲜与加工》2005,(2):55-58

In general, the process of synthesis the refractory nanoparticles Is classified as solid state, liquid state and gaseity. The new progress and development in the study of refractory nanoparticles are investigated. The synthesis technology of the refrectory nanoparticle in liquid state is discussed mostly. The refrectory nanoparticles is synthesized by the liquid state. The characteristics and the structure of the refrectory nanoparticles have been studied in this paper.  相似文献   

A Study on the FMS Planning and Scheduling System     

Hu Lide Yang Dan Wang Shilong 《保鲜与加工》1993,(6):58-64

After researching the function requirements of the planning and scheduling in manufacturing cells, the paper advanced a control structure with three phases, i. e. planning , scheduling and dispatching. The paper represented in detail the main purposes, requirements and scheduling actions in each phase. It suits to general machining FMSs.  相似文献   

Recommendations on Shrinkage and Temperature Reinforcements in Concrete Slabs     

LI Lei 《保鲜与加工》2004,(4):45-50

The mechanism of shrinkage cracking is discussed with a simple member, which is fully restrained and subjected only to an axial restraining force caused by shrinkage, while a simple procedure is presented for the determination of the number and spacing of the cracks and the average crack width. With the simple model, some examples are shown to compare the provisions for minimum shrinkage and temperature reinforcement in GB 50010-2002 Code, ACI 318-02 Code and AS 3600-1988 Code. The results show that the provisions in GB 50010-2002 Code are too weak in comparison with the others. Finally, some recommendations are proposed.  相似文献   

A HIERARCHICAL CONTROL METHOD FOR REACTIVE POWER OPTIMIZATION IN LARGE-SCALED INTERCONNECTED POWER SYSTEMS     

Liu Haijun Deng Renming 《保鲜与加工》1992,(5):51-56

This paper presents a new hierarchical and coordinative control method for reactive power optimization in large-scale interconnected power systems. It combines the interconnection forecast method for hierarchical control in large-scale steady state industrial systems with the incremental linear programming method for reactive power optimization in real time. The results of applying the method to power system examples show that the method not only solves the problem of high dimension in order, but also keeps the advantages of the incremental linear programming method. The proposed method is also suitable for the security analysis of reactive power correction in large-scale interconnected power systems.  相似文献   

Water model study on flow optimization of five streams L-type tundish     

MA Guojun  CHENG Puhong  WANG Chenghui  CHENG Changgui 《保鲜与加工》2015,(2):87-92

In this paper, the water model method is used to optimize the flow behavior of asymmetrical five streams L-type tundish in a steelmaking plant. The results show that the optimization plan is set up with turbulence suppressor T+ vice guide wall D2+ main guide wall with three holes (D1a) which consists of top two holes with 25° inclination and one hole with 30° inclination below. With this plan, the time which the colorants reach to the outlets increases, the difference of response time in all outlets decreases, the peak concentration of the RTD reduces, the existence time of high concentration liquid steel extends, and the ratio of dead zone in each streams reduces.  相似文献   

Survey on the Resistance of Soils under Pile-box Foundation of Certain Skyscraper     

CAO Shu-gang~  LIU Yu-cheng~  XU Jian~ 《保鲜与加工》2005,(1):53-55

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Study on the Land Use Right in Urban Housing Dismantling and Moving     

Ceng WenGe  Yang YuJing  Xie FuCheng 《保鲜与加工》2005,(3):125-129

With the strengthening of constitutional protection that legal private property is not to be encroached upon and the land usufructs paid regime are further clear, the regime of urban housing dismantling and moving is facing a vigorous test. This paper analyzes three problems: the justice of the withdrawal of land use right, the legality of the alteration of the land use right and the rationality of the compensation of the land use right during the urban housing dismantling and moving. Finally, this paper tries to find some effective measures to solve the chain problems.  相似文献